The deceased was identified as Jagannath Prajapat, a resident of Badagaun of Baran district, said ASI, Sadar police station Mahaveer Prasad Bhargav.
Police have lodged a case against the truck driver.
Jagannath was selling vegetables at his roadside stall when the truck hit him before ramming a kiosk which was shut at the time of the mishap.
Jagannath sustained severe injuries in the mishap and was rushed to the government hospital where he succumbed to his injuries during treatment, the ASI said.
The body of the deceased was handed over to his family after a post-mortem.